Sink



FIG. 1 is a top, front, right side, perspective view of a sink showing our new design;

FIG. 2 is a top, front, left side, perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a top, front, right side, perspective view thereof;

FIG. 9 is a top, front, left side, perspective view thereof;

FIG. 10 is a front view thereof;

FIG. 11 is a left side view thereof;

FIG. 12 is a right side view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof.

Broken lines of the disclosure represent portions of sink that form no part of the claimed design. 

CLAIM We claim the ornamental design for a sink, as shown and described. 